What is the character limit for SMS text messages?

Plivo’s APIs support sending SMS in all text-based languages (e.g., English, French, Chinese, Arabic, etc.).

Messages containing only GSM03.38 seven-bit characters have a maximum limit of 1600 characters. Messages that are longer than 160 characters will be split into multiple messages with each message consisting of a maximum of 153 characters.

Messages containing one or more UCS-2 16-bit Unicode characters have a maximum limit of 737 characters. Messages longer than 70 characters will be split into multiple messages, with each message consisting of a maximum of 67 characters. The list of Unicode characters can be found here: https://unicode-table.com/en/#control-character

Multi-unit messages are automatically stitched back together and delivered as a single message in countries where mobile networks support long message concatenation.

 

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